Procyanidin B1 and procyanidin B2 are B-type dimers found in grape seed. Both join two flavan-3-ol units through a single carbon-carbon interflavan bond, commonly C4 to...

Grape seeds contain both small flavan-3-ol units and larger chains built from those units. Catechin and epicatechin are monomers. When several flavan-3-ols connect, they form oligomeric...

Grape seed oil and grape seed extract begin with the same plant material but emphasize very different compound families. Luvixy Cayenne Pepper 12-in-1 uses grape seed...

Hawthorn, grape seed and ginkgo are all described as polyphenol-rich, but that broad label hides meaningful differences. Hawthorn supplies flavonoids and procyanidins, grape seed is especially...

Grape seeds contain concentrated polyphenols that are largely absent from clarified grape juice. Their best-known group is proanthocyanidins, chains of flavan-3-ol units with strong redox activity....